Purchased this kit two years ago, drove on it for one summer (did not drive the car at all last summer). It's got no more than 5-7k kms on it by my best estimate. Here's a link to the kit on GC's site: http://www.ground-control-store.com/.../II=857/CA=283
Spring rates are 280F, 430R IIRC. I just went with their suggestion on what would be best for a street driven car on shitty roads. The housings are shortened (2") and powdercoated. Hubs/bearings were replaced at time of install as well. The only downside is that I forgot to order new backing plates and dust caps at the time and didn't want to wait any longer to get them on the car, so I used the old ones.
Price is $1200. These are basically brand new; if you tally up the cost of the kit, hubs, exchange, shipping, duties, you're WELL over 2K.